2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
26 #include "redirects.h"
32 static bool print_rules
= false;
33 static enum fw3_family use_family
= FW3_FAMILY_ANY
;
36 static struct fw3_state
*
39 struct fw3_state
*state
= NULL
;
40 struct uci_package
*p
= NULL
;
42 state
= malloc(sizeof(*state
));
45 error("Out of memory");
47 memset(state
, 0, sizeof(*state
));
48 state
->uci
= uci_alloc_context();
51 error("Out of memory");
53 if (uci_load(state
->uci
, "firewall", &p
))
55 uci_perror(state
->uci
, NULL
);
56 error("Failed to load /etc/config/firewall");
59 if (!fw3_find_command("ipset"))
61 warn("Unable to locate ipset utility, disabling ipset support");
62 state
->disable_ipsets
= true;
65 fw3_load_defaults(state
, p
);
66 fw3_load_ipsets(state
, p
);
67 fw3_load_zones(state
, p
);
68 fw3_load_rules(state
, p
);
69 fw3_load_redirects(state
, p
);
70 fw3_load_forwards(state
, p
);
76 free_state(struct fw3_state
*state
)
78 struct list_head
*cur
, *tmp
;
80 list_for_each_safe(cur
, tmp
, &state
->zones
)
81 fw3_free_zone((struct fw3_zone
*)cur
);
83 list_for_each_safe(cur
, tmp
, &state
->rules
)
84 fw3_free_rule((struct fw3_rule
*)cur
);
86 list_for_each_safe(cur
, tmp
, &state
->redirects
)
87 fw3_free_redirect((struct fw3_redirect
*)cur
);
89 list_for_each_safe(cur
, tmp
, &state
->forwards
)
90 fw3_free_forward((struct fw3_forward
*)cur
);
92 uci_free_context(state
->uci
);
96 fw3_ubus_disconnect();
101 restore_pipe(enum fw3_family family
, bool silent
)
105 cmd
= (family
== FW3_FAMILY_V4
) ? "iptables-restore" : "ip6tables-restore";
108 return fw3_stdout_pipe();
110 if (!fw3_command_pipe(silent
, cmd
, "--lenient", "--noflush"))
112 warn("Unable to execute %s", cmd
);
120 family_running(struct list_head
*statefile
, enum fw3_family family
)
122 struct fw3_statefile_entry
*e
;
126 list_for_each_entry(e
, statefile
, list
)
128 if (e
->type
!= FW3_TYPE_DEFAULTS
)
131 return hasbit(e
->flags
[0], family
);
139 family_used(enum fw3_family family
)
141 return (use_family
== FW3_FAMILY_ANY
) || (use_family
== family
);
145 family_loaded(struct fw3_state
*state
, enum fw3_family family
)
147 return hasbit(state
->defaults
.flags
, family
);
151 family_set(struct fw3_state
*state
, enum fw3_family family
, bool set
)
154 setbit(state
->defaults
.flags
, family
);
156 delbit(state
->defaults
.flags
, family
);
160 stop(struct fw3_state
*state
, bool complete
, bool restart
)
163 enum fw3_family family
;
164 enum fw3_table table
;
166 struct list_head
*statefile
= fw3_read_statefile();
168 if (!complete
&& !statefile
)
171 warn("The firewall appears to be stopped. "
172 "Use the 'flush' command to forcefully purge all rules.");
177 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
179 if (!complete
&& !family_running(statefile
, family
))
182 if (!family_used(family
) || !restore_pipe(family
, true))
185 info("Removing %s rules ...", fw3_flag_names
[family
]);
187 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
189 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
192 info(" * %sing %s table",
193 complete
? "Flush" : "Clear", fw3_flag_names
[table
]);
195 fw3_pr("*%s\n", fw3_flag_names
[table
]);
199 fw3_flush_all(table
);
204 fw3_flush_rules(table
, family
, false, statefile
);
205 fw3_flush_zones(table
, family
, false, statefile
);
208 fw3_flush_rules(table
, family
, true, statefile
);
209 fw3_flush_zones(table
, family
, true, statefile
);
218 family_set(state
, family
, false);
224 !family_loaded(state
, FW3_FAMILY_V4
) &&
225 !family_loaded(state
, FW3_FAMILY_V6
) &&
226 fw3_command_pipe(false, "ipset", "-exist", "-"))
228 fw3_destroy_ipsets(statefile
);
232 fw3_free_statefile(statefile
);
235 fw3_write_statefile(state
);
241 start(struct fw3_state
*state
, bool restart
)
244 enum fw3_family family
;
245 enum fw3_table table
;
247 struct list_head
*statefile
= fw3_read_statefile();
249 if (!print_rules
&& !restart
&&
250 fw3_command_pipe(false, "ipset", "-exist", "-"))
252 fw3_create_ipsets(state
);
256 for (family
= FW3_FAMILY_V4
; family
<= FW3_FAMILY_V6
; family
++)
258 if (!family_used(family
))
261 if (!family_loaded(state
, family
) || !restore_pipe(family
, false))
264 if (!restart
&& family_running(statefile
, family
))
266 warn("The %s firewall appears to be started already. "
267 "If it is indeed empty, remove the %s file and retry.",
268 fw3_flag_names
[family
], FW3_STATEFILE
);
273 info("Constructing %s rules ...", fw3_flag_names
[family
]);
275 for (table
= FW3_TABLE_FILTER
; table
<= FW3_TABLE_RAW
; table
++)
277 if (!fw3_has_table(family
== FW3_FAMILY_V6
, fw3_flag_names
[table
]))
280 info(" * Populating %s table", fw3_flag_names
[table
]);
282 fw3_pr("*%s\n", fw3_flag_names
[table
]);
283 fw3_print_default_chains(table
, family
, state
);
284 fw3_print_zone_chains(table
, family
, state
);
285 fw3_print_default_head_rules(table
, family
, state
);
286 fw3_print_rules(table
, family
, state
);
287 fw3_print_redirects(table
, family
, state
);
288 fw3_print_forwards(table
, family
, state
);
289 fw3_print_zone_rules(table
, family
, state
);
290 fw3_print_default_tail_rules(table
, family
, state
);
295 family_set(state
, family
, true);
300 fw3_free_statefile(statefile
);
303 fw3_write_statefile(state
);
309 lookup_network(struct fw3_state
*state
, const char *net
)
312 struct fw3_device
*d
;
314 list_for_each_entry(z
, &state
->zones
, list
)
316 list_for_each_entry(d
, &z
->networks
, list
)
318 if (!strcmp(d
->name
, net
))
320 printf("%s\n", z
->name
);
330 lookup_device(struct fw3_state
*state
, const char *dev
)
333 struct fw3_device
*d
;
335 list_for_each_entry(z
, &state
->zones
, list
)
337 list_for_each_entry(d
, &z
->devices
, list
)
339 if (!strcmp(d
->name
, dev
))
341 printf("%s\n", z
->name
);
353 fprintf(stderr
, "fw3 [-4] [-6] [-q] {start|stop|flush|restart|print}\n");
354 fprintf(stderr
, "fw3 [-q] network {net}\n");
355 fprintf(stderr
, "fw3 [-q] device {dev}\n");
361 int main(int argc
, char **argv
)
364 struct fw3_state
*state
= NULL
;
365 struct fw3_defaults
*defs
= NULL
;
367 while ((ch
= getopt(argc
, argv
, "46qh")) != -1)
372 use_family
= FW3_FAMILY_V4
;
376 use_family
= FW3_FAMILY_V6
;
380 freopen("/dev/null", "w", stderr
);
389 if (!fw3_ubus_connect())
390 error("Failed to connect to ubus");
392 state
= build_state();
393 defs
= &state
->defaults
;
404 if (use_family
== FW3_FAMILY_V6
&& defs
->disable_ipv6
)
405 warn("IPv6 rules globally disabled in configuration");
407 if (!strcmp(argv
[optind
], "print"))
409 freopen("/dev/null", "w", stderr
);
411 state
->disable_ipsets
= true;
414 rv
= start(state
, false);
416 else if (!strcmp(argv
[optind
], "start"))
418 rv
= start(state
, false);
420 else if (!strcmp(argv
[optind
], "stop"))
422 rv
= stop(state
, false, false);
424 else if (!strcmp(argv
[optind
], "flush"))
426 rv
= stop(state
, true, false);
428 else if (!strcmp(argv
[optind
], "restart"))
430 rv
= stop(state
, false, true);
431 rv
= start(state
, !rv
);
433 else if (!strcmp(argv
[optind
], "network") && (optind
+ 1) < argc
)
435 rv
= lookup_network(state
, argv
[optind
+ 1]);
437 else if (!strcmp(argv
[optind
], "device") && (optind
+ 1) < argc
)
439 rv
= lookup_device(state
, argv
[optind
+ 1]);